Data Joins with dplyr

For this assignment, you’re going to re-create this .html file and use some of the data joining functions from the dplyr package.

You can review the slides for this assignment here, and the exercises are here

Step 1:

Create the project using the goodenuffR::goodenuff_project() function:

goodenuffR::goodenuff_project(
  project_name = "wk11-table-joins", 
  folder_path = "path/to/hw/folder")

Replace path/to/hw/folder with the path to your folder.

Step 2:

Install the following packages by running this in the Console

install.packages(c("tidyverse", "starwarsdb", "dm"))

Install rmdformats package by running this in the Console

install.packages(remotes)  # if necessary
remotes::install_github("juba/rmdformats")

Load rmdformats package by running this in the Console

library(rmdformats)

Step 3:

Create a new R Markdown file using FIle > New File > R Markdown… > From Template > Then give this file a name

Step 4:

Replace the setup chunk with the code below:

library(tidyverse)
library(starwarsdb)
library(dm)
# create data folder
knitr::opts_chunk$set(
  cache = FALSE,
  echo = TRUE,
  collapse = FALSE,
  eval = TRUE,
  message = FALSE,
  warning = FALSE,
  dev = "ragg_png",
  out.width = '85%',
  fig.path = "img/",
  dpi = 320,
  fig.align = "center",
  fig.width = 7,
  fig.height = 5.5,
  fig.retina = 2
  )
# tibble printing
options(
  pillar.print_max = 10, 
  pillar.print_min = 10)

Step 5:

Create outline using Markdown syntax


# Objectives 

## Load packages 

## Toy data 

# Joins

## `starwarsdb` 

## Create `StarWarsFilms`

## `left_join` {.tabset}

### Example

### Solution

## `inner_join` {.tabset}

### Example

### Solution

## `right_join` {.tabset}

### Example

### Solution

## `anti_join` {.tabset}

### Example

### Solution

Step 6 Exercises:

Copy and paste the necessary sections from the exercises to get the Example and Solution to work (I’ve included the first two below to get you started)

```{r StarWarsDataModel, message=FALSE, warning=FALSE}
StarWarsDataModel <- dm::dm_draw(dm = starwars_dm(), 
                                 view_type = "all",
                                 graph_name = "StarWarsDataModel")
StarWarsDataModel
```

```{r StarWarsFilms}
StarWarsFilms <- starwarsdb::films %>% 
                    select(-c(opening_crawl, director, producer)) %>% 
                    filter(episode_id >= 4 & episode_id <= 6)
StarWarsFilms
```

All of the exercises should have the code chunks set to eval=TRUE
You can set the setup chunk to error=TRUE, so if a code chunk doesn’t render and look like the example in the exercises, read the error and try to de-bug (this is a huge part of coding)

Knit, and knit often:

Every time you change an eval argument, click on the “Knit” icon in R Studio and review the output. This will prevent errors from building up (and you get to see your handy work!)

When you’re finished:

Email me the final knitted .html file with the Examples and Solutions